Detecting a second companion. The filled circles are the posterior means ⟨χ²⟩ measuring the goodness-of-fits of the Bayesian single-orbit solutions to the simulated scan vectors for the two-orbit model. The amplitudes are β_A = 10 and log β_B = −0.6(0.05)0.6. The open circles are the corresponding values of given by Eq. (4). The dotted lines are the values for α = 0.025,0.975 with N = 70.